import book.BookList;
import user.AdminUser;
import user.NormalUser;
import user.User;

import java.util.Scanner;

public class Main {
    //利用向上转型，达到返回值的一致性
    public static User login() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入姓名：");
        String name = scanner.nextLine();
        System.out.println("请选择登录身份：1.管理员 2.普通用户");
        int choice = scanner.nextInt();
        if(choice == 1) {
            return new AdminUser(name);
        }else {
            return new NormalUser(name);
        }
    }
    public static void main(String[] args) {

        //核心代码，将用户、操作、书联系在了一起//

        BookList bookList = new BookList();
        User user = login();
        while(true) {
            int choice = user.menu();
            //通过user和choice两个对象，就可以和操作建立联系
            user.doOperation(choice,bookList);
        }
    }
}
